Electric welding and fusion deposition of metals.



ARTHUR PERGY STBOHMENGER, OE WESTMINSTER,.I4ONDON, ENGLAND, ASSIGNOR TO GREAT BRITAIN AND. 'IBELAND.

' SLAUGHTER & comrnnx, LIMITED,- or onmnzsnemn n CORPORATION or nnnc'riuc wnnnme nn FUSION nnrosrrx'onv or METALS.

No Drawing.-

To all whom. it may concern: a

Be it known that I, ARTHUR PERoY 'STROHMENGER, a subject of the King of of current, and the work to the other pole,

it is sometimes found that the weld or deposit is not as satisfactory as it should be, and this may be due to a variety of causes. In the case particularly of hard steels the surface may be deteriorated by pitting or otherwise. The slag also sometimes tends to adhere to the surface and is difiicult to get away in the Welding or deposition of carbon steels. Now I have found that if I use in conjunction with the electrode, a rela* tively small quantity of a different metal capable of exerting a strong. reducing action, that is to say a metal having'a strong affinity for oxygen at the temperature at which the welding or deposition takes place, I can obtain better and more uniform results, while the welding or deposition is more easily effected.

Aluminium fulfils the purpose admirably as it can be used in the form of a fine wire which may be laid alongside the electrode and bound therewith in the covering of insulating material such as blue asbestos which ultimately forms the slag during the welding or depositing. operation. It 1s found that the aluminium oxidizes and so prevents to a considerable extent the oxida- I at all with the homogeneity of the weld or deposit. 7

The use. of alumimum 1n (3011]11IlOtlOh w1th Specification ofLetters Patent. 1 Patent d He 29 1 915;

' Application filed December 23, 19 14.- Serial N a. 878,808. i

the: electrode-ads also: of advantage. in re-d ducing the percentage of carbon necessary in the metal of the electrode when a weld or deposit of a carbon steel is required. Owlng to its reducing action the aluminium shields to some extent the carbon of the steel from the oxidation to which it is liable 1n the fusion. It is still necessary to use an electrode having a somewhat higher carbon content than that required in the weld or deposit, but it. is a. desideratum to avoid the necessity for using such high carbon steels as are now needed in electrodes for certain purposes, and the use of this invention enables an appreciable reduction to be made. For instance, where a steel containing 0.9% of carbon was formerly re-- quired as electrode, a percentage of 0.8 or 0.7 may vsufiice when the electrode is used with an aluminium wire beside the same.

The aluminium employed is very small in amount as compared with the electrode metal; for example, an iron electrode of gage 10 requires only an aluminium wire of gage 34 placed alongside it and inclosed with it.in the insulating coating, in order to attain the advantages of this invention. In this case the amount of aluminium used in relation to the iron is about 0.2%.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. An electrode for use in a process of electric welding or fusion-deposition of metals, comprising a metallic core and another metal adjacent said core, the other metal being capable of exerting a strong reducing action at the fusion temperature,

and an insulating layer upon said core.

2. An electrode for use in a process of electric Welding or fusion-deposition of metals, comprising a -metallic core, a wire of another metal having a greater afiinity for oxygen than the core metal, and laid alongside the metal core, and an insulating coating around the core and Wire.

3. An electrode for use in a process of electric welding or fusion-deposition of metals, comprising a metallic core of a com a w v 7 1,144,300

" electrode comprising a metallic core, arelatively thin wire of aluminium laid. alongside said core and a cover of insulating material capable of forminga slag at the fusion 6 temperature of the core. I c 5. As a new article of manufacture, an

electrode for use in electri'cwelding and;

fusion-deposition of -metals, comprising a metallic core ofa composition selected ac 10 cording to the nature of the metal to" be deposited, a relatively fine wire of aluminium disposed adjacent to said core along the the presence of two SllbSCIlblIlg witnesses- ARTHUR PERGY STROHMENQER. Witnesses: p

H. W. BLAKE, v H. D. JAMESON. 

